package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeNameExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
//        password = DigestUtils.md5DigestAsHex(password.getBytes());//md5加密密码
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee dbEmployee=employeeMapper.getByUsername(employeeDTO.getUsername());
        if (dbEmployee!=null){
            throw new EmployeeNameExistException("用户名"+dbEmployee.getUsername()+"已经存在");
        }

        Employee employee = new Employee();
//        对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
//        为其他属性赋值
//        设置 账号的状态，默认正常状态 1表示正常， 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);
//        设置默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
//        设置当前记录的创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

//        设置当前记录人id和修改人id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }


    /**
     * 员工分页查询
     * @param dto
     * @return
     */
    @Override
    public PageResult query(EmployeePageQueryDTO dto) {
//        用mybatis插件
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
//        动态sql查询
        Page<Employee> page= employeeMapper.query(dto);


        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 启用禁用员工账号
     */
    @Override
    public void startOrClose(Integer status, Long id) {

        employeeMapper.startOrClose(status,id);
    }

    /**
     * 回显
     * @param id
     * @return
     */
    @Override
    public Employee getInfoById(Integer id) {
        return  employeeMapper.getInfoById(id);
    }

    /**
     * 修改员工
     * @param emp
     */
    @Override
    public void updateEmp(Employee emp) {
        emp.setUpdateTime(LocalDateTime.now());
        emp.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateEmp(emp);
    }
}
